Thomas barb otje



@niet met @anni @mit HOMSJBAR'BOUR, 0F BOSTON, NASSAGHUSETTS.

Letters Patent N'o. 61,139, ZatecZ January 15, 1867.

IMPROVEMENT IN PlOTOGRAPHIC CAMERAS.

TO ALL PERSONS TO WHOM THESE PRESENTS SHALL COME:

Be it known that l, THOMAS BAnBoUR, of Bostbn, in the county of Suffolk, and State of Massachusetts, have invented certain newaand useful Improvements in Cameras for taking Photographic Impressions, etc and that the following description, taken in connection with the accompanying plate of drawings, hereinafter referred te, forms a full and exact specication of the same, wherein I have set forth the-nature and principles of my said improvements, by which my invention may be distinguished from all others of a similar class, together with such parts as I claim,'and desire to have secured to me by Letters Patent.

vThe present invention relates to certain new and useful improvements in cameras for taking photographic and other like impressions, and consists in so arranging a series of devices as to allow the camera to be more readily, conveniently, and accurately adjusted; also so arranging and operating a plate within the same as to permit of a greater number of impressions being taken on one plate with more ease and rapidity than has heretofore been accomplished by the means formerly used.

Improvements in cameras halve from time to time been made to obviate the inconvenience and delay occasioned by the use of separate plates for each impression, such as the employment of a single sliding-plate, by causing the lens of the camera to be made adjustable, and by various other similar methods. And although the purpose of'these former improvements may be identical with the present one, the arrangement and operation of their devices are entirely dissimilar, as will be seen by the following description, and the accompanying plate of drawings, of which- Figure 1 is a rear view of my improved cameia, with the glass and frame removed.

Figure 2 is a central vertical longitudinal section.

Figure 3 is a front, and

Figure 4, a side view.

a a a, in the drawings, represent the case or outside frame of a. camera, which turns on a pivot, so as to allow of its being adjusted laterally, and is prevented from turning beyond the desired position on either side by stop-pieces, c c, attached to the top of an adjustable stand, d cZ, that is made in two portions. l'lfhe upper portion of the stand Z (Z is hinged to the lower portion, and is operated by a lever, ce, hingedat its centre te the lower portion of' the stand Z Z in such a manner that the upper portion of the stand fZ (Z, and consequently the case a a, which rests upon it, may be raised or lowered thereby. Within the case a a is a plate, ff, on each side of which are attached racks, gg, in which engage pinions, h It, attached to a rod or shaft, This rod,z'z', extends between the plat-eff and racks gg, and through the sides ofthe camera case a and serves to support and operate the plateff. On the back of the plate ff slips, ZZ, are formed to receive and hold a plate, m m, in which are made four openings, n n n n., corresponding in4 size to the impressions -to be taken, and behind which is placed the material prepared for the impressions. Attached to one end of the rod it', on the outside of the case aa, is a wheel, Ich, by turning whichl the teeth of Elije pinions hlt are made to engage with those or the racks gg in such a manner as tc raise or lower, as may be desired, the plate ff. 'Extending over the wheel/bk, and pivoted to a standard, o o, is a movable arm, pp, having a portion of its under side cut away so as to allow the top of the wheel c cto travel therein and to regulate the proper distance, that the rod iz' may be pushed in or ydrawn out; the rod z'z' being allowed to play freely in its bearing, g g, attached to the standard o and the sides ofthe case a a, through which it passes. In the bottom of the outer case a a a slot, rr, is formed, through which plays a screw or pivot, s s, attached to a slide, tt, for the purpose of increasing or diminishing the distance between the plateff and the lens u uof the camera a a; and when the case a a is brought to the desired position, it is `held therein by means of a screw-cap, o n, being screwed down upon the bottom of the case a a, so as to form a firm bearingthereon In the front of' the camera ac are four lenses, to et, which permit four impressions of one object to be taken at one time on the same plate. 1t will readily be observed that when these four impressions, represented in the drawings by the openings n n n n, have been taken by 'pressing in the Wheel '7s attached to the rod it', which is connected with the plateff by the pinions Zt z and racks gg, the plate fj" is moved 'one side, and space is left. on the plateff for four more impressions, nl #nl nl, shown by dotted lines in fig. 1. By turning the wheel c t thepinions L Zz are made to engage in the racks g g, and the plateffie raised or lowered thereby, and four other impressions, n2 n2 n2 n2, as shown by the dotted red lines, are produced. By drawing outthe wheel k c the plate is moved back again and four more impressions, n3 11.311,3 n, shown by the dotted blue lines, are taken over those first made. Thus it will be observed that eight or more impressions can be takenon one plate, and the instrument quickly and accurately adjusted to the proper focusand angle of light, so that all the impressions can be taken at one sitting, thereby saving time, labor, and expense to the operator, and inconvenience and fatigue to the sitter. i Y

, From the foregoing description, reference being made to the drawings, it will be seen that, by unloosening the screw-cap v v, the screw or pivot s s and the slide tt, to which it is attached, are allowed to play freely up and. down in the slot rr, thereby allowing the distance between the lenses u u and plate ff to be easily and' conveniently regulated, and the proper focus obtained. By raising the case a a by pressing upon one -end of the lever ee, connected with the stand del, or by moving the oase a a either to the right or left, as may be desired, by means of the pivot ?;,-on which it turns, the instrument can be readily and accurately adjusted to the required position, which, in the latter case, is determined by the stoppieces c c, and the desired angles of light obtained with less trouble and inconvenience than has heretofore been experienced. Thus, when the lateral movements of the plateff are made, a corresponding change must be made in the position of the case in order that the rays of light shall impinge exactly upon the spots on the plate where the impressions are to be taken; therefore the case has been placed loosely upon the stand, with no positive means of setting it at the proper angle, its desired position being obtained only after repeated trials. By the abovedescribed arrangements the relative positions of the movable plate in the case are determined with' regard to each other by one simple movement. When the plate is moved vertically the lever serves the same purpose in adjusting the case, so as to bring the rays of light to bear upon thc proper points of the plate.

Having thus described my improvements, I shall state my claims as follows What I claim, as my invention, and desire to .have secured to me by Letters Patent, is-

1. The arrangement of the plate ff, racks gg, pinions hlt, rod z'z', wheel c 7c, and adjustable arm 10p, as hereinabove described and for the purposes specified.' o

2. Arranging the case upon a pivot, so as to turn thereon in combination with suitable stops, as herein described and for the purposespecied.

3. The use of the lever e e for elevating and depressing the case, as described.

4. The use of the movable plate or frame ff, operating as described and for the purpose specified.

THOS. BARBOUIL Wtnessess JOSEPH GAvETr, SAMUEL M. BARTON. 

